I recently upgraded to mailman3 on two Debian servers and I am getting a cron error periodically sent to me as depicted below. It looks like a permission problem, however, /var/lib/mailman3/locks and /var/lib/mailman3/* all have user = "list" and group = "list" and the cron job runs as user = "list" so I don't quite understand why I am getting these errors.

Hopefully, someone might reply with what the problem is.

Thanks,

Gordon

Here is some additional information:

"ls -ld locks" output: drwxr-xr-x 2 list list 4096 Sep 28 08:51 locks

ls -l locks" output: total 12 -rw-rw---- 1 list list 80 Sep 28 00:00 'dbcreate.lck|slc.mailhub4u.com|24435|4056142050254595815' -rw-rw---- 2 list list 77 Sep 28 2020 master.lck -rw-rw---- 2 list list 77 Sep 28 2020 'master.lck|slc.mailhub4u.com|5291|3708878559945320758'

Here is the error message that is emailed to me:

Traceback (most recent call last): File "/usr/lib/python3/dist-packages/flufl/lock/_lockfile.py", line 216, in lock os.link(self._claimfile, self._lockfile) FileExistsError: [Errno 17] File exists: '/var/lib/mailman3/locks/dbcreate.lck|slc.mailhub4u.com|24435|4056142050254595815' -> '/var/lib/mailman3/locks/dbcreate.lck'

During handling of the above exception, another exception occurred:

Traceback (most recent call last): File "/usr/bin/mailman", line 11, in <module> load_entry_point('mailman==3.2.1', 'console_scripts', 'mailman')() File "/usr/lib/python3/dist-packages/click/core.py", line 764, in __call__ return self.main(*args, **kwargs) File "/usr/lib/python3/dist-packages/click/core.py", line 716, in main with self.make_context(prog_name, args, **extra) as ctx: File "/usr/lib/python3/dist-packages/click/core.py", line 641, in make_context self.parse_args(ctx, args) File "/usr/lib/python3/dist-packages/click/core.py", line 1089, in parse_args rest = Command.parse_args(self, ctx, args) File "/usr/lib/python3/dist-packages/click/core.py", line 940, in parse_args value, args = param.handle_parse_result(ctx, opts, args) File "/usr/lib/python3/dist-packages/click/core.py", line 1477, in handle_parse_result self.callback, ctx, self, value) File "/usr/lib/python3/dist-packages/click/core.py", line 96, in invoke_param_callback return callback(ctx, param, value) File "/usr/lib/python3/dist-packages/mailman/bin/mailman.py", line 94, in initialize_config initialize(value) File "/usr/lib/python3/dist-packages/mailman/core/initialize.py", line 218, in initialize initialize_2(propagate_logs=propagate_logs) File "/usr/lib/python3/dist-packages/mailman/core/initialize.py", line 177, in initialize_2 config.db = getUtility(IDatabaseFactory, utility_name).create() File "/usr/lib/python3/dist-packages/mailman/database/factory.py", line 50, in create with Lock(os.path.join(config.LOCK_DIR, 'dbcreate.lck')): File "/usr/lib/python3/dist-packages/flufl/lock/_lockfile.py", line 334, in __enter__ self.lock() File "/usr/lib/python3/dist-packages/flufl/lock/_lockfile.py", line 248, in lock elif self._read() == self._claimfile: File "/usr/lib/python3/dist-packages/flufl/lock/_lockfile.py", line 442, in _read with open(self._lockfile) as fp: PermissionError: [Errno 13] Permission denied: '/var/lib/mailman3/locks/dbcreate.lck'